Electrically-operated valve.



No. 896,120. PATENTED AUG. 18, 1908.

O. KRAMER. ELEGTRIO'ALLY OPERATED VALVE.

APPLICATION FILED MAY 2, 1906.

a f' J CHRISTIAN KER, 0F FRAflKFORT-ON-THE-MAIN, GERMANY, ASSIGNOR TO FELTEN & GUILLEAE-LAHMEYEEWERKE ACTIEN-GESELLSCHAFT, OF FRAN KFORT-ON-TH E-MAIN,

GERMANY.

ELEG'IRICALLY-OPERATED VALVE.

spedfication of Letters Patent.

Patented Aug. 18, 1908.

To all whom. it may concern:

Be it known that l, Cmrs'rrm Kiilinnn, a. subject of the German Empire, and a resident of Frankiort-on-the-Main, Germany, have invented certain new and useful Improvements in Electrically-Operated Valves, of which the followin is a specification.

The valves operated by electricity hitherto known have the disadvantage that they are unsuitable for working by alternating current, as the armature actuating the valve proper vibrates under the action of alternatmg currents and its vibrations are commu' nicated to the valve proper, so that it does not close properly against its seat.

The ob ect of this invention is to obviate this disadvantage by roviding a valvular mechanism capable of lieing operated either by a direct current, or an alternate current, in which valvular mechanism the armature moved by electrical meansis nbt rigidly attached to the valve proper but a certain amount of play is allowed so that the vibrations of the armature are not communicated to the valve proper.

The accompanying sectional diagram illustrates a distributing valvular mechanism in which two valves proper (e and b) can be-so actuated by one armature c of a magnet d that the passage e, connected for instance with a working cylinder, can be put into communication either with a liquidor compressed air, or gas reservoir through the passage f, or with an exhaust passage g. The stem of the valve proper a can move relatively to the armature c to an amount determined by the adjustable stops in. The stem of the valve proper b is provided with a stop 11. On the other side the valve proper b is sustained on the cross-head m of the armature 6 through the medium of a spring k.

The cross-head m serves as a coupling between the valves a, b, the stems of which extend through apertures or passa es therein; and the several parts of the mac auism are inclosed in a suitable casing The operation oi this valvular mechanism is as follows: One of the two valves proper is always closed. Let it be presumed that the valve proper a is closed, the admission of the fluid from the aforesaid reservoir to the cylinder is therefore cut off. The magnet d is then energized so that the armature c is attracted and valve proper b is pressed onto its seat by the spring 3:. Before the closing position is reached, the valve proper I) is energetically urged towards its seat by the pressure of the fluid. The armature of the magnet can now oscillate relatively to the valve stems and in the direction of their motion, without the valve body I) being affected by such oscillation and therefore an alternating electric current can be used. The stroke of the valve pro er a may of course be so determined that t e play of the valve prptper does not unduly reduce the section o e ux of the fluid.

The object of the invention may be attained without any mechanical play, or relative movement between the valve and armature,'for instance when the power which acts to cause the armature of the alternating current magnet to oscillate is small when compared with the pressure that holds the valve against its seat, the essential point being that the movement of the valve ropcr is initiated b the armature, while t e. closure is secured y the pressure of the fluid independently of the oscillations of the armature.

I claim:

1. The combination with a valve casing having supply and exhaust openings, of an electro-magnet within said casing, and valves for controlling'the sup l and exhaust openings to the casing botli connected with and adapted to be adjusted by the armature of said magnet.

2. The combination of a valve casing having sup ly and exhaust openings formed in one wall, valves controlling said openings, one of said valves being adapted to be seated within the casing and the other outside the casing, and an elect-ro-magnet having its armature connected with and adapted to move both said valves.

3. The combination of a valve casing having sup ly and exhaust openings formed in one wall, valves controlling said openings, one of said valves being adapted to be seated within the casing and the other outside the casing, an elcctro-magnet, and connections between the valves and the armature of the magnet for moving said valves while permitting a limited movement of each valve relative to the armature.

4. The combination of a valve casing having sup ly and exhaust openings formed in one wall, valves controlling said openings, one of said valves being adapted to be seated within the casing and the other outside the Ill) casing, an electro-Inagnet, a cross head or coupling loosely engaging the stems of the valves and conneetedwith the armatureof the magnet, stops mounted on the stem of 5 one valve on opposite sides of and adapted to be engaged by said cross head, a stop at the free end of the other valve stem adapted to be engaged by said cross head; and a spring surrounding the stem of the last said valve 1 and hearing on the head thereof and on said 10 erosshead;

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHRISTIAN KRAMER.

Witnesses:

FRANZ HAPLAGHER, Enwm PiPPrrz. 

